This medium helps identify whether Gram-negative bacteria are lactose fermenters or not.

该类培养基有助于鉴别革兰氏阴性是否为乳糖发酵。

It consists of peptidoglycan which usually helps differentiate whether bacteria are gram positive or gram negative.

细胞壁由肽聚糖组成，通常可以帮助细的种类，判断它们是革兰氏阳性还是革兰氏阴性。

Alright, as a quick recap, leptospira is a genus of tiny spiral gram-negative bacteria that can be seen under a darkfield microscope.

得！快速回：钩端螺旋体是种细小的革兰氏阴性，它可以在暗视野显微镜中被观察到。

They have a cell wall which protects the bacteria, determines whether they are gram positive or gram negative bacteria and also helps maintain their shape.

保护细的细胞壁决定了细是革兰氏阳性还是革兰氏阴性，并且参与维持细的形状。

Now, Leptospira is a tiny spiral bacteria, that stains poorly with Gram staining, because it doesn't retain the Gram dyes well, so it's classically considered gram-negative.

钩端螺旋体是种细小的螺旋形病，革兰氏染色效果较差，因为它不能很好地保留染色剂，所以通常认为它是种革兰氏阴性。

And our documentary film is partially about a group of bacteria known as gram-negative bacteria that can be very dangerous if you get an infection.

我们的纪录片部讲述了组被称为革兰氏阴性的细，如果您受到感染，它们会非常危险。